This handy iPhone/iPod Touch application assists you in easily figuring out square footage of a room. Whether you want to calculate just the walls, ceiling or a slope (triangle), or any combination of the previous you would like to figure.

After you input any dimensions you have, total square footage is figured and displayed, along with the number of 4' x 8' (8' is the default, you can change to any length)drywall sheets you will need.